The chant was heard midway through United's 4-1 win over Burton Albion in the Carabao Cup on Wednesday, despite the club promising to take action against individuals caught participating in the stands.

Lukaku has hit the ground running since moving to Manchester, scoring five goals in as many Premier League games.

The striker also netted in the 3-0 win over Basel in the Champions League.

He was rested for the win over Burton in midweek but is set to return to the side against Southampton tomorrow.